Relativistic multireference Fock-space coupled-cluster calculation of the forbidden 6s2S01→6s5dD13 magnetic-dipole transition in ytterbium
Chiranjib Sur, Rajat K. Chaudhuri
We report the forbidden $6{s}^{2}\phantom{\rule{0.2em}{0ex}}^{1}S_{0}\ensuremath{\rightarrow}6s5d\phantom{\rule{0.2em}{0ex}}^{3}D_{1}$ magnetic-dipole transition amplitude computed using multireference Fock-space coupled-cluster theory. Our computed transition matrix element $(1.34\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}){\ensuremath{\mu}}_{B}$ is in excellent agreement with the experimental value $(1.33\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}){\ensuremath{\mu}}_{B}$. This value in combination with other known quantities will be helpful in determining the parity-nonconserving amplitude for the $6{s}^{2}\phantom{\rule{0.2em}{0ex}}^{1}S_{0}\ensuremath{\rightarrow}6s5d\phantom{\rule{0.2em}{0ex}}^{3}D_{1}$ transition in atomic Yb. To our knowledge, this calculation is the most accurate to date, and can be very important in the search for physics beyond the standard model. We further report the $6s6p\phantom{\rule{0.2em}{0ex}}^{3}P_{0}\ensuremath{\rightarrow}6s6p\phantom{\rule{0.2em}{0ex}}^{1}P_{1}$ and $6s5d\phantom{\rule{0.2em}{0ex}}^{3}D_{1}\ensuremath{\rightarrow}6s6p\phantom{\rule{0.2em}{0ex}}^{3}P_{0}$ transition matrix elements, which are also in good agreement with the earlier theoretical estimates.
arXiv:0707.3576•Physical Review A•Jul 20, 2007•9 citations